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Hacking an analog clock to sync with NTP - Part 4

Assuming the jumper wires from the clock are connected to pins D1 and D2 on the ESP-12, the following Arduino sketch will make it function as a normal clock that ticks every second:

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tickPin = D1;
os_timer_t secTimer;

// Triggered by system timer every second
void timerCallback(void *pArg) {
  tickOccured = true;
}

void setup() {
  // Setup GPIO outputs
  pinMode(D1, OUTPUT);
  pinMode(D2, OUTPUT);
  digitalWrite(D1, LOW);
  digitalWrite(D2, LOW);

  // Start system timer which triggers every second
  os_timer_setfn(&secTimer, timerCallback, NULL);
  os_timer_arm(&secTimer, 1000, true);
}

void loop() {
  if (tickOccured) {
    tickOccurred - false;
    tickPin = (tickPin == D1 ? D2: D1);
    digitalWrite(tickPin, HIGH);
    delay(100);
    digitalWrite(tickPin, LOW);
    delay(100);
  }  
  delay(250);
}

To be continued...

Comments

  1. You refer to D1 & D2 on your board, however I'm having trouble translating that to a normal ESP-12. Could you tell me which pins you have defaulted to using this diagram?

    http://simba-os.readthedocs.io/en/latest/_images/esp12e-pinout.png

    ReplyDelete
    Replies
    1. From this link:

      http://www.esp8266.com/viewtopic.php?f=21&t=1388

      I believe D1 = IO14, D2 = IO12

      Delete
  2. Thanks for sharing! I'm using this for an art project at the FB HQ.

    A few comments:

    Line 23 should be: tickOccurred = false;

    And in some places of the code there's a typo — you use "tickOccured" instead of "tickOccurred".

    ReplyDelete
    Replies
    1. Thanks for pointing out the spelling error. I have corrected it in the Github repo.

      Delete

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